Answer
(0,0)
r=4
Plot the center at the origin and draw a circle around it with a radius of 4.
Domain=[-4,4]
Range=[-4,4]
Work Step by Step
Since nothing is subtracted from x or y before squaring and the equation is in standard form, the center is the origin.
r$^2$=16
r=4
Observe your graph to see that the domain and range both include all real numbers from -4 to 4.
